The Online Books Page

Books by David Ray Mitchell:

Books in the extended shelves:

• Mitchell, David Ray, 1898-: Contributions to the study of coal; Banded ingredients of no. 6 coal and their heating values as related to washability characteristics and preliminary report on unit coal-specific gravity curves of Illinois coals (Urbana, Illinois, 1934), also by Louis Cordell McCabe and Gilbert H. Cady (page images at HathiTrust)
• Mitchell, David Ray, 1898-: Contributions to the study of coal; proximate analyses and screen tests of coal mine screenings produced in Illinois (Urbana, Illinois, 1935), also by Louis Cordell McCabe and Gilbert H. Cady (page images at HathiTrust)
• Mitchell, David Ray, 1898-: More profit in mechanical mining through studies of loading and gathering performance (School of Mineral Industries, 1949), also by Abraham Wayne Bitner (page images at HathiTrust)
• Mitchell, David Ray, 1898-: Washability characteristics of Illinois coal screenings (Urbana, Ill., 1937), also by Louis Cordell McCabe, University of Illinois (Urbana-Champaign campus). Engineering Experiment Station, and Illinois State Geological Survey (page images at HathiTrust)
• Mitchell, David Ray, 1898-: Washability tests of Illinois coals, conducted by the Engineering Experiment Station, University of Illinois in cooperation with the Zeigler Coal and Coke Company. (University of Illinois, 1930), also by A. C. Callen and Zeigler Coal and Coke Company (page images at HathiTrust)

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